Keybindings with the Shift modifier now work correctly. So do bindings

which use the Space key.  Limit unmodified user keybindings to the
function keys.
Python Bug 775353, IDLEfork Bugs 755647, 761557

Improve error handling during startup if there's no Tkinter.

M NEWS.txt
M PyShell.py
M config-keys.def
M configHandler.py
M keybindingDialog.py

Backport candidate.

Lib/idlelib/NEWS.txt

@@ -3,6 +3,10 @@ What's New in IDLE 1.0+?
 
 *Release date: XX-XXX-2003*
 
+- Keybindings with the Shift modifier now work correctly.  So do bindings which
+  use the Space key.  Limit unmodified user keybindings to the function keys.
+  Python Bug 775353, IDLEfork Bugs 755647, 761557
+
 - After an exception, run.py was not setting the exception vector. Noam
   Raphael suggested correcting this so pdb's postmortem pm() would work. 
   IDLEfork Patch 844675

Lib/idlelib/PyShell.py

@@ -16,7 +16,12 @@ import exceptions
 import linecache
 from code import InteractiveInterpreter
 
-from Tkinter import *
+try:
+    from Tkinter import *
+except ImportError:
+    print>>sys.__stderr__, "** IDLE can't import Tkinter.  " \
+                           "Your Python may not be configured for Tk. **"
+    sys.exit(1)
 import tkMessageBox
 
 from EditorWindow import EditorWindow, fixwordbreaks

Lib/idlelib/config-keys.def

@@ -30,10 +30,10 @@ open-new-window=<Control-Key-n>
 open-window-from-file=<Control-Key-o>
 plain-newline-and-indent=<Control-Key-j>
 print-window=<Control-Key-p>
-redo=<Control-Shift-Key-z>
+redo=<Control-Shift-Key-Z>
 remove-selection=<Key-Escape>
-save-copy-of-window-as-file=<Alt-Shift-Key-s>
-save-window-as-file=<Control-Shift-Key-s>
+save-copy-of-window-as-file=<Alt-Shift-Key-S>
+save-window-as-file=<Control-Shift-Key-S>
 save-window=<Control-Key-s>
 select-all=<Control-Key-a>
 toggle-auto-coloring=<Control-Key-slash>
@@ -78,7 +78,7 @@ open-window-from-file=<Control-Key-x><Control-Key-f>
 plain-newline-and-indent=<Control-Key-j>
 print-window=<Control-x><Control-Key-p>
 python-docs=<Control-Key-h>
-python-context-help=<Control-Shift-Key-h>
+python-context-help=<Control-Shift-Key-H>
 redo=<Alt-Key-z> <Meta-Key-z>
 remove-selection=<Key-Escape>
 save-copy-of-window-as-file=<Control-Key-x><Control-Key-y>
@@ -128,9 +128,9 @@ open-new-window=<Command-Key-n>
 open-window-from-file=<Command-Key-o>
 plain-newline-and-indent=<Control-Key-j>
 print-window=<Command-Key-p>
-redo=<Shift-Command-Key-z>
+redo=<Shift-Command-Key-Z>
 remove-selection=<Key-Escape>
-save-window-as-file=<Shift-Command-Key-s>
+save-window-as-file=<Shift-Command-Key-S>
 save-window=<Command-Key-s>
 save-copy-of-window-as-file=<Option-Command-Key-s>
 select-all=<Command-Key-a>

Lib/idlelib/configHandler.py

@@ -531,7 +531,7 @@ class IdleConf:
             '<<print-window>>': ['<Control-p>'],
             '<<redo>>': ['<Control-y>'],
             '<<remove-selection>>': ['<Escape>'],
-            '<<save-copy-of-window-as-file>>': ['<Alt-Shift-s>'],
+            '<<save-copy-of-window-as-file>>': ['<Alt-Shift-S>'],
             '<<save-window-as-file>>': ['<Alt-s>'],
             '<<save-window>>': ['<Control-s>'],
             '<<select-all>>': ['<Alt-a>'],

Lib/idlelib/keybindingDialog.py

 """
-dialog for building tkinter accelerator key bindings
+Dialog for building Tkinter accelerator key bindings
 """
 from Tkinter import *
 import tkMessageBox
@@ -49,9 +49,9 @@ class GetKeysDialog(Toplevel):
         frameMain.pack(side=TOP,expand=TRUE,fill=BOTH)
         frameButtons=Frame(self)
         frameButtons.pack(side=BOTTOM,fill=X)
-        self.buttonOk = Button(frameButtons,text='Ok',
-                width=8,command=self.Ok)
-        self.buttonOk.grid(row=0,column=0,padx=5,pady=5)
+        self.buttonOK = Button(frameButtons,text='OK',
+                width=8,command=self.OK)
+        self.buttonOK.grid(row=0,column=0,padx=5,pady=5)
         self.buttonCancel = Button(frameButtons,text='Cancel',
                 width=8,command=self.Cancel)
         self.buttonCancel.grid(row=0,column=1,padx=5,pady=5)
@@ -85,9 +85,13 @@ class GetKeysDialog(Toplevel):
             self.modifier_checkbuttons[modifier] = check
             column += 1
         labelFnAdvice=Label(self.frameControlsBasic,justify=LEFT,
-                text="Select the desired modifier\n"+
-                     "keys above, and final key\n"+
-                     "from the list on the right.")
+                            text=\
+                            "Select the desired modifier keys\n"+
+                            "above, and the final key from the\n"+
+                            "list on the right.\n\n" +
+                            "Use upper case Symbols when using\n" +
+                            "the Shift modifier.  (Letters will be\n" +
+                            "converted automatically.)")
         labelFnAdvice.grid(row=1,column=0,columnspan=4,padx=2,sticky=W)
         self.listKeysFinal=Listbox(self.frameControlsBasic,width=15,height=10,
                 selectmode=SINGLE)
@@ -102,17 +106,19 @@ class GetKeysDialog(Toplevel):
         self.buttonClear.grid(row=2,column=0,columnspan=4)
         labelTitleAdvanced = Label(self.frameKeySeqAdvanced,justify=LEFT,
                 text="Enter new binding(s) for  '"+self.action+"' :\n"+
-                "(will not be checked for validity)")
+                "(These bindings will not be checked for validity!)")
         labelTitleAdvanced.pack(anchor=W)
         self.entryKeysAdvanced=Entry(self.frameKeySeqAdvanced,
                 textvariable=self.keyString)
         self.entryKeysAdvanced.pack(fill=X)
         labelHelpAdvanced=Label(self.frameHelpAdvanced,justify=LEFT,
-            text="Key bindings are specified using tkinter key id's as\n"+
+            text="Key bindings are specified using Tkinter keysyms as\n"+
                  "in these samples: <Control-f>, <Shift-F2>, <F12>,\n"
-                 "<Control-space>, <Meta-less>, <Control-Alt-Shift-x>.\n\n"+
-                 "'Emacs style' multi-keystroke bindings are specified as\n"+
-                 "follows: <Control-x><Control-y> or <Meta-f><Meta-g>.\n\n"+
+                 "<Control-space>, <Meta-less>, <Control-Alt-Shift-X>.\n"
+                 "Upper case is used when the Shift modifier is present!\n\n" +
+                 "'Emacs style' multi-keystroke bindings are specified as\n" +
+                 "follows: <Control-x><Control-y>, where the first key\n" +
+                 "is the 'do-nothing' keybinding.\n\n" +
                  "Multiple separate bindings for one action should be\n"+
                  "separated by a space, eg., <Alt-v> <Meta-v>." )
         labelHelpAdvanced.grid(row=0,column=0,sticky=NSEW)
@@ -149,20 +155,12 @@ class GetKeysDialog(Toplevel):
         self.BuildKeyString()
 
     def BuildKeyString(self):
-        keyList=[]
-        modifiers=self.GetModifiers()
-        finalKey=self.listKeysFinal.get(ANCHOR)
-        if modifiers: modifiers[0]='<'+modifiers[0]
-        keyList=keyList+modifiers
+        keyList = modifiers = self.GetModifiers()
+        finalKey = self.listKeysFinal.get(ANCHOR)
         if finalKey:
-            if (not modifiers) and (finalKey not
-                    in self.alphanumKeys+self.punctuationKeys):
-                finalKey='<'+self.TranslateKey(finalKey)
-            else:
-                finalKey=self.TranslateKey(finalKey)
-            keyList.append(finalKey+'>')
-        keyStr=string.join(keyList,'-')
-        self.keyString.set(keyStr)
+            finalKey = self.TranslateKey(finalKey, modifiers)
+            keyList.append(finalKey)
+        self.keyString.set('<' + string.join(keyList,'-') + '>')
 
     def GetModifiers(self):
         modList = [variable.get() for variable in self.modifier_vars]
@@ -190,9 +188,10 @@ class GetKeysDialog(Toplevel):
                 self.whitespaceKeys+self.editKeys+self.moveKeys)
         self.listKeysFinal.insert(END, *keys)
 
-    def TranslateKey(self,key):
-        #translate from key list value to tkinter key-id
-        translateDict={'~':'asciitilde','!':'exclam','@':'at','#':'numbersign',
+    def TranslateKey(self, key, modifiers):
+        "Translate from keycap symbol to the Tkinter keysym"
+        translateDict = {'Space':'space',
+                '~':'asciitilde','!':'exclam','@':'at','#':'numbersign',
                 '%':'percent','^':'asciicircum','&':'ampersand','*':'asterisk',
                 '(':'parenleft',')':'parenright','_':'underscore','-':'minus',
                 '+':'plus','=':'equal','{':'braceleft','}':'braceright',
@@ -200,14 +199,16 @@ class GetKeysDialog(Toplevel):
                 ':':'colon',',':'comma','.':'period','<':'less','>':'greater',
                 '/':'slash','?':'question','Page Up':'Prior','Page Down':'Next',
                 'Left Arrow':'Left','Right Arrow':'Right','Up Arrow':'Up',
-                'Down Arrow': 'Down'}
+                'Down Arrow': 'Down', 'Tab':'tab'}
         if key in translateDict.keys():
-            key=translateDict[key]
-        key='Key-'+key
+            key = translateDict[key]
+        if 'Shift' in modifiers and key in string.ascii_lowercase:
+            key = key.upper()
+        key = 'Key-' + key
         return key
 
-    def Ok(self, event=None):
-        if self.KeysOk():
+    def OK(self, event=None):
+        if self.KeysOK():
             self.result=self.keyString.get()
             self.destroy()
 
@@ -215,40 +216,39 @@ class GetKeysDialog(Toplevel):
         self.result=''
         self.destroy()
 
-    def KeysOk(self):
-        #simple validity check
-        keysOk=1
-        keys=self.keyString.get()
+    def KeysOK(self):
+        "Validity check on user's keybinding selection"
+        keys = self.keyString.get()
         keys.strip()
-        finalKey=self.listKeysFinal.get(ANCHOR)
-        modifiers=self.GetModifiers()
-        keySequence=keys.split()#make into a key sequence list for overlap check
-        if not keys: #no keys specified
-            tkMessageBox.showerror(title='Key Sequence Error',
-                    message='No keys specified.')
-            keysOk=0
-        elif not keys.endswith('>'): #no final key specified
-            tkMessageBox.showerror(title='Key Sequence Error',
-                    message='No final key specified.')
-            keysOk=0
-        elif (not modifiers) and (finalKey in
-                self.alphanumKeys+self.punctuationKeys):
-            #modifier required
-            tkMessageBox.showerror(title='Key Sequence Error',
-                    message='No modifier key(s) specified.')
-            keysOk=0
-        elif (modifiers==['Shift']) and (finalKey not
-                in self.functionKeys+('Tab',)):
-            #shift alone is only a useful modifier with a function key
-            tkMessageBox.showerror(title='Key Sequence Error',
-                    message='Shift alone is not a useful modifier '+
-                            'when used with this final key key.')
-            keysOk=0
-        elif keySequence in self.currentKeySequences: #keys combo already in use
-            tkMessageBox.showerror(title='Key Sequence Error',
-                    message='This key combination is already in use.')
-            keysOk=0
-        return keysOk
+        finalKey = self.listKeysFinal.get(ANCHOR)
+        modifiers = self.GetModifiers()
+        # create a key sequence list for overlap check:
+        keySequence = keys.split()
+        keysOK = False
+        title = 'Key Sequence Error'
+        if not keys:
+            tkMessageBox.showerror(title=title, parent=self,
+                                   message='No keys specified.')
+        elif not keys.endswith('>'):
+            tkMessageBox.showerror(title=title, parent=self,
+                                   message='Missing the final Key')
+        elif not modifiers and finalKey not in self.functionKeys:
+            tkMessageBox.showerror(title=title, parent=self,
+                                   message='No modifier key(s) specified.')
+        elif (modifiers == ['Shift']) \
+                 and (finalKey not in
+                      self.functionKeys + ('Tab', 'Space')):
+            msg = 'The shift modifier by itself may not be used with' \
+                  ' this key symbol; only with F1-F12, Tab, or Space'
+            tkMessageBox.showerror(title=title, parent=self,
+                                   message=msg)
+        elif keySequence in self.currentKeySequences:
+            msg = 'This key combination is already in use.'
+            tkMessageBox.showerror(title=title, parent=self,
+                                   message=msg)
+        else:
+            keysOK = True
+        return keysOK
 
 if __name__ == '__main__':
     #test the dialog